Apparatus and method for detecting vehicle location in navigation system

a technology of navigation system and apparatus, applied in traffic control systems, navigation instruments, instruments, etc., can solve the problems of wasting fuel, traffic congestion, and wasting more than 14.35 billion liters of fuel per year, and 2.7 billion hours of work tim
US20050149261A9Active Publication Date: 2005-07-07LG ELECTRONICS INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
LG ELECTRONICS INC
Publication Date
2005-07-07

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Abstract

When a vehicle location is estimated using only detection signals from a sensor unit installed on a vehicle since the value of dilution of precision (DOP) of a navigation message received by a GPS receiver is equal to or greater than a predetermined threshold in a navigation system, the vehicle location is precisely estimated using a traveled distance, a travel angle difference, and lateral and longitudinal inclinations of the vehicle. The value of DOP of the navigation message received by the GPS receiver is compared with the predetermined threshold. If the value of DOP is less than the predetermined threshold, reference vehicle location information is set using the navigation message. If the value of DOP is equal to or greater than the predetermined threshold, the reference vehicle location information is set using vehicle location information just previously map-matched and the detection signals from the sensor unit. The vehicle location is estimated using the set reference vehicle location information and the detection signals from the sensor unit and then map-matched on a digital map stored in a map data storage unit, thereby displaying the map-matched results on a display unit.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] Pursuant to 35 U.S.C. §119(a), this application claims the benefit of earlier filing date and right of priority to Korean Patent Application Nos. 10-2003-49855, 10-2003-101284, 10-2004-4477, 10-2004-28386, 28387, filed on Jul. 21, 2003, December 31, Jan. 20, 2004, 2003, Apr. 23, 2004, Apr. 24, 2004, and Apr. 24, 2004 respectively, the contents of which are hereby incorporated by reference herein in their entirety. BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates to an apparatus and method for detecting a vehicle location in a navigation system, wherein a vehicle location can be precisely estimated using detection signals from sensors installed at a vehicle and then map-matched on a digital map so as to be displayed on a display screen.

[0004] 2. Description of the Related Art

[0005] As the number of vehicles such as cars continuously increases, traffic congestion becomes more critical. Pa...

Claims

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